/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.edi.db.type;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.sql.Clob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

public class ClobType extends NullableType {
	public Class getReturnedClass() {
		return Clob.class;
	}

	public int sqlType() {
		return Types.CLOB;
	}

	public boolean isEqual(Object x, Object y) {
		return x == y;
	}

	public String getName() {
		return "clob";
	}

	public Object get(ResultSet rs, String name) throws SQLException {
		Reader charReader = rs.getCharacterStream(name);

		// if the corresponding SQL value is NULL, the reader we got is NULL as well
		if (charReader == null)
			return null;

		// Fetch Reader content up to the end - and put characters in a StringBuffer
		StringBuffer sb = new StringBuffer();
		try {
			char[] buffer = new char[2048];
			while (true) {
				int amountRead = charReader.read(buffer, 0, buffer.length);
				if (amountRead == -1)
					break;
				sb.append(buffer, 0, amountRead);
			}
		} catch (IOException ioe) {
			ioe.printStackTrace();
			throw new SQLException("IOException occurred reading text");
		} finally {
			try {
				charReader.close();
			} catch (IOException e) {
				e.printStackTrace();
				throw new SQLException("IOException occurred closing stream");
			}
		}

		// Return StringBuffer content as a large String
		return sb.toString();

	}

	public void set(PreparedStatement st, Object value, int index)
			throws SQLException {

		if (value == null) {
			st.setNull(index, Types.CLOB);
		} else {
			String str = (String) value;
			st.setCharacterStream(index, new StringReader(str), str.length());

		}

	}

	@Override
	public String getTypeValue(Object value) {
		// TODO Auto-generated method stub
		return String.valueOf(value);
	}

}
